It's fairly obvious that, in translating Hal Jordan to the big screen in the 2011 motion picture/abomination Green Lantern, someone involved in the project saw how successful Tony Stark had become and decided that some of Tonys most distinctive character traits (namely that of his snark and cockiness) should be implanted into Jordan. This, of course, didn't work, for one simple reason; Stark uses his wisecracks as a defense mechanism of sorts, a way to combat the forces around him that he's all too aware he can't control. Plus, underneath all his flippant remarks is a good person, one who, in the first Iron Man movie, plainly says that protecting people with his Iron Man technology needs to be his only purpose in life.
